1. With the ULN2003A motor driving chip
2. all pins of the chip have been led out to make connection easy
3. with pins of 5-12V power supply
4. with 4 signal indicator
5. with XH-5P socket directly connected with the 28BYJ-48 model stepper motor
6. PCB board size: 40.5 (mm) x21.3 (mm)
